Analysis of PI and PR controllers for distributed power generation system under unbalanced grid faults

Dash, Ashish Ranjan; Babu, B. Chitti; Mohanty, Kanungo Barada; Dubey, Rahul

doi:10.1109/icpes.2011.6156688

Cited by 22 publications

(9 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The DC link voltage [4,6] is controlled according to the simulated voltage control scheme shown in Fig. 2.…”

Section: A Data Based Maximum Power Point Techniquementioning

confidence: 99%

“…A new Pulse Width Modulation (PWM)-based control scheme is implemented by [5] which controls electronic valves in a 2-level VSC based DVR. Under unbalanced fault conditions, behavior of PI and Proportional Resonant (PR) controllers is addressed in [6]. Study of active and reactive power variation during single phase to ground fault is also done.…”

Section: Introductionmentioning

confidence: 99%

“…A forced commutated VSC is considered in DVR along with energy storage to maintain capacitor voltage. The basic function of medium voltage DVR is to inject a voltage component of desired amplitude, frequency and phase, [6], between PCC and grid in series with the utility or load voltage. The essential part for well-performance of controller in DVR is sag-detection circuit.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Grid connected photovoltaic system with data-based MPPT and fuzzy controlled DVR

Gupta

Chanana

Thakur

2014

2014 IEEE 6th India International Conference on Power Electronics (IICPE)

View full text Add to dashboard Cite

This paper presents the impact of a fuzzy logic controlled dynamic voltage restorer on a transformer-less singlestage grid-connected solar photovoltaic system controlled by a data based maximum power point tracking technique. The solar photovoltaic system uses a data based maximum power point technique to derive maximum power from solar photovoltaic array and maintains constant DC voltage by changing modulation index of voltage source converter. A dynamic voltage restorer with pulse width modulated control is introduced to mitigate unbalanced sag in grid voltage and current during fault conditions. Fuzzy logic control (FLC) has been implemented to maintain voltage at grid side for normal as well as for faulted conditions. Simulation results show that distortion in active and reactive power exchange among solar photovoltaic converter, load and grid is reduced during fault conditions. A reduction in total harmonic distortion for all temperature conditions, low and high solar radiation is observed in grid voltage and current. Apart from these, it has been observed that distortion in DC link voltage while deriving maximum power from photovoltaic array is considerably reduced by introducing fuzzy logic controlled dynamic voltage restorer in proposed system.Keywords-Dynamic voltage restorer, fuzzy logic control, maximum power point tracking, power quality, solar photovoltaic.

show abstract

“…The DC link voltage [4,6] is controlled according to the simulated voltage control scheme shown in Fig. 2.…”

Section: A Data Based Maximum Power Point Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Grid connected photovoltaic system with data-based MPPT and fuzzy controlled DVR

Gupta

Chanana

Thakur

2014

2014 IEEE 6th India International Conference on Power Electronics (IICPE)

View full text Add to dashboard Cite

show abstract

“…Interaction of switching vector ( ( ) t s ) with 2 nd order harmonic voltage on dc-link results 3 rd order harmonic voltage on converter pole voltage, which in turn injects 3 rd harmonic current to the supply and deteriorate the performance of system. Again 3 rd harmonic component in supply current causes 4 th order harmonic voltage on dc-link and this cumulative process continue and cause more even harmonic components on dc-link[6]. Thus presence of odd harmonic component of order (2c+1) causes even harmonic component of order 2c on dc-link.III.CONTROL STRATEGYA.…”

mentioning

confidence: 98%

Analysis of PR controller for eliminating double frequency oscillations in DC-link of 3-Ф shunt APF during source disturbances

Gupta

Jena

Babu

2013

2013 Students Conference on Engineering and Systems (SCES)

View full text Add to dashboard Cite

Shunt active power filter is widely used in modern electrical distribution system and it needs an accurate control algorithm that provides robust performance under source and load unbalances. During source voltage disturbances, the presence of negative sequence component in the source current causes significant double frequency oscillations in the dc-link and it can lead to deterioration of dc-link capacitor. Proportional-Resonant (PR) controllers are attracted an increase in interest due to its superior performance over the traditional Proportional Integral (PI) controllers, when regulating sinusoidal signals. This paper presents a control scheme based on Proportional Resonant (PR) controller to eliminate such oscillations in order to keep the ripple free constant dc-link voltage under source disturbances. Further, the higher order harmonics presents in the source current are compensated using PR controller and are discussed in the paper. The studied system is modeled and simulated in MATLAB-Simulink environment for effectiveness of the study.Index Terms-2 nd order harmonics, dc-link voltage, proportional resonant (PR) controller, active power filter (APF), total harmonic distortion (THD).

show abstract

“…A feedforward voltage is used to ensure fast voltage commutation of the IIDG unit. The control scheme contains a proportionalresonant (PR) controller which has two important advantages over commonly implemented proportional-integration controllers: PR controllers have zero steady state error and do not require knowledge of the AC side filter circuit parameters of the IIDH unit [9]. The control scheme also contains a phase locked loop (PLL) which determines the phase of the voltage at the IIDG unit's point of common coupling.…”

Section: Iidg Fault Approximation Toolmentioning

confidence: 99%

Fault approximation tool for grid-connected inverter-interfaced distributed generators

Kennedy

Ciufo

Agalgaonkar

2014

2014 Australasian Universities Power Engineering Conference (AUPEC)

View full text Add to dashboard Cite

A novel fault approximation tool (FAT) is presented for use in distribution networks with a high penetration of inverter-interfaced distributed generation. The FAT does not rely on balanced operation nor an absolute reference point for voltage calculations, both of which are required for Newton-Raphson load flow calculations. Simulations show that the FAT provides an accurate representation of the transient and steadystate fault response for unbalanced faults when juxtaposed with a detailed small-signal model. The `subtransient' response of the inverter-interfaced distributed generation is omitted to remove data considered extraneous from the perspective of distribution line protection analysis. The FAT is not appropriate for analysing the efficacy of distributed generation local protection and is inappropriate for islanded applications. The FAT is designed explicitly for the purpose of utility line protection design and analysis. Abstract-A novel fault approximation tool (FAT) is presented for use in distribution networks with a high penetration of inverter-interfaced distributed generation. The FAT does not rely on balanced operation nor an absolute reference point for voltage calculations, both of which are required for NewtonRaphson load flow calculations. Simulations show that the FAT provides an accurate representation of the transient and steadystate fault response for unbalanced faults when juxtaposed with a detailed small-signal model. The 'sub-transient' response of the inverter-interfaced distributed generation is omitted to remove data considered extraneous from the perspective of distribution line protection analysis. The FAT is not appropriate for analysing the efficacy of distributed generation local protection and is inappropriate for islanded applications. The FAT is designed explicitly for the purpose of utility line protection design and analysis.

show abstract

Analysis of PI and PR controllers for distributed power generation system under unbalanced grid faults

Cited by 22 publications

References 8 publications

Grid connected photovoltaic system with data-based MPPT and fuzzy controlled DVR

Grid connected photovoltaic system with data-based MPPT and fuzzy controlled DVR

Analysis of PR controller for eliminating double frequency oscillations in DC-link of 3-Ф shunt APF during source disturbances

Fault approximation tool for grid-connected inverter-interfaced distributed generators

Contact Info

Product

Resources

About

Analysis of PI and PR controllers for distributed power generation system under unbalanced grid faults

Cited by 22 publications

References 8 publications

Grid connected photovoltaic system with data-based MPPT and fuzzy controlled DVR

Grid connected photovoltaic system with data-based MPPT and fuzzy controlled DVR

Analysis of PR controller for eliminating double frequency oscillations in DC-link of 3-&#x0424; shunt APF during source disturbances

Fault approximation tool for grid-connected inverter-interfaced distributed generators

Contact Info

Product

Resources

About

Analysis of PR controller for eliminating double frequency oscillations in DC-link of 3-Ф shunt APF during source disturbances